What term refers to a relatively permanent inclination to react in a particular way?

The term that accurately describes a relatively permanent inclination to react in a particular way is "disposition." This word conveys the idea of a person's inherent qualities of mind and character, suggesting that it is a stable, enduring pattern of behavior or temperament. Dispositions can influence how individuals respond to various situations over time.

While "tendency," "habituation," and "bent" may relate to behavioral inclinations, they do not capture the concept of a more permanent or intrinsic quality as effectively as "disposition." A tendency often refers to a general inclination that might not be as stable, while habituation refers to a process of becoming accustomed to stimuli over time, which does not directly imply a permanent inclination. The term "bent" can denote a strong inclination but is less commonly used in psychological contexts to describe lasting behavioral patterns.